Hair-dye.



its first-wing,

'xnins, before they'sre applied EECHXltD WOLFFENSTEIN AND TO ACTIEN e-n'ssnrscuumr F'iIlR- Amt'm sesmmmou, on BERLIN,

JAMES GGLMAN, 0E BERL'KN, onset W, .hSQIGrNURS onnuws.

lemons.

To all whom it my coeeten:

Be it known thstwe, RICHARD WQLFE'EN- scrum and JAMES CGLMAN, the former u suloject'of the Emperor of Germuny,:the let ter u citizen of the United States of North America, residing at Berlin,Germuny, our post -ofiice addresses being, the former Meineirestresse 24, Berlin, N. 15, end the letter Kurfiirstendemm 2%, Berlin," W. 15, have invented certain new and useful Imsoroveinents in Heir-Dyes, of which the fol iowing is sspecificetion.

It is Well known min re much us for the production of hair 'ysgi outthe'se dyespossess a great disedvztntcge in that the actionmf their losses prcducesen irritating efiect '01 the human skin,

importsnce because some individuals are remarkably sensitive to such irritutimn. Our

resent invention overcomes this and other disadvantages and is based on thesurgmsmg discovery that the irritating efiect of such diemins can be avoided it these dieto the hair, ere inconporsted with e lsi'ger proportion of a normal sulfite, such for instance, as sodium suliite. The result is that-We can produce improved heir dyes which have no such irritating ciiect on the human skin and which can be used by any one.

order to obtain such an improved hair dye, 2 parts by weight of the respective die.- min, as for instance para-phenylenediemin or pura-toluylenediumin, are incorporated with l punt by Weight of normul anhydrous sodium sulfitc, or with another soluble slkuli sulfite. If such s hair set is applied to the hair in an aqueous solution and in the presence of s suitable oxidizing agent, very fast pecially, black tints are obtained without any irritating efiect on the human skin. In order to avoid such irritating eil'ect, it is, however, sullite beyond the shove-given quantity, which is to be regarded as a minimum.

The following examples may serve to illustrate our invention, the ports being by Weight:

(1) As an example'of our improved heir Specification ofi Letters Patent. huplicetion filed m 17, 1am. 8min No. 561,370.

. "drogen peroxid that eromstlc dieinins and more particulu lypers-phenylenedisconsists in applying the solution to the hair for instance by This disadvantage is oi greut hydrous normal sodium sulfite,

and'beeutiful time, and more essafer to increase the addition; of

Moses Moi; s, sle.

dyes in' solution, the following" mey he given.v 9 ports of parwtoluylenediemm ce ium-flushes and upurts of anhydrous normal. sodium 'sulfite are dissolved together in 8&2 ports of water. V'lhis solution represents our new composition of matter and itrnay be. used for dyeing purposes, for instonce as follows: The concentrated solution as: above obtained is mixed,,with 200 perts'of s by s?lution of-;3% strength. This mixed solu ion represents the improved hair dye ready for use, which use means of e brush, end in at short time, a fine and deep block will do velop.

(2) @111 improved hair dye state, accordi to the present invention, may he obtaine for instance by" him]. pulverizing 10 ports of psre-phenylene "uunn and incorporeting therewith 10 *FIWM of onv or instance by, thoroughly grinding together-{the two products. In order to use this improued hair dye, it may be dissolved in water, a suitable quantity of hydrogennerosid 1 uy be added, and the dye may he epplied to the hair in the usual munuer It is obvious that our present invention is not limited to the {oregoin examples or to the details given therein. er'insts'nce, the proportions of the respectivodienzi u and of the normal sulfite may be vuieiedb Furthermore, instead of perwphewyienediumin m1 psi-wtoluylenediumin, any other! aromatic poI'e-diemin suitub e for the pur ose ofour present invention may he emp eyed. ll i nelly, instead of the normal anhydrous so dium sulfitc employed shove, the equivalent roportion of the crystallised salt or another normalalkalisulfite, either crystallized or anhydrous, may he used. I

The shades obtained with our improved hair dye naturally dcrilend largely upon the special nature of the air to be dyed; end,

in the dry on the other hand, the concentration of the employing more.'or less dilute solutions of the dyes. hat e claim is:

1. As new compositions of matter improved hair dyes derived from an aromatic para-diamin comprising an aromatic diamin and a normal alkali sulfite in such prometal.

3. As a new composition of matter improvedhair dyes in solution comprising para-toluylenediamin and a normal alkali v sulfite in such proportion that to two parts by Weight of the para-toluylenediamin they contain at least-one part by Weight of an anhydrous normal alkali sulfite of the formula Me SO in which formula Me stands for an alkali metal. 1

4. As a new composition of matter an improved hair dye in solution comprising 9 parts of para-toluylenediami'n (CH :NH :NH =1:2:5), 9 parts of anhydrous normal sodium sulfite and 82 parts of Water.

In testimony whereof we have hereunto set our hands in presenoe of-two subscribing witnesse "RICHARD WOLFFENSTEIN.

JAMES COLMAN.

lVitnesses: v l

HENRY HASPER, WOLDEMAR HAUPT. 

